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• Totem crashes immediately after startup in 12.10

  - by Sakib Hasan

  I did a fresh install of Ubuntu 12.10 and did sudo apt-get update && sudo apt-get update. Then I installed ubuntu-restricted-extras, audacious and vlc from Software Center. After that I tried launch Totem Movie player but in terminal following error comes up: (totem:9295): Gdk-ERROR **: The program 'totem' received an X Window System error. This probably reflects a bug in the program. The error was 'BadDrawable (invalid Pixmap or Window parameter)'. (Details: serial 1808 error_code 9 request_code 152 minor_code 9) (Note to programmers: normally, X errors are reported asynchronously; that is, you will receive the error a while after causing it. To debug your program, run it with the GDK_SYNCHRONIZE environment variable to change this behavior. You can then get a meaningful backtrace from your debugger if you break on the gdk_x_error() function.) Trace/breakpoint trap (core dumped) I tried purge and again install. But the error remains. What should I do?

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• is wisdom of what happens 'behind scenes' (in compiler, external DLLs etc.) important?

  - by I_Question_Things_Deeply

  I have been a computer-fanatic for almost a decade now. I've always loved and wondered how computers work, even from the purest, lowest hardware level to the very smallest pixel on the screen, and all the software around that. That seems to be my problem though ... as I try to write code (I'm pretty fluent at C++) I always sit there enormous amounts of time in front of a text-editor wondering how every line, statement, datum, function, etc. will correspond to every Assembly and machine instruction performed to do absolutely everything necessary for the kernel to allocate memory to run my compiled program, and all of the other hardware being used as well. For example ... I would write cout << "Before memory changed" << endl; and run the debugger to get the Assembly for this, and then try and reverse disassemble the Assembly to machine code based on my ISA, and then research every .dll, library file, linked library, linking process, linker source code of the program, the make file, the kernel I'm using's steps of processing this compilation, the hardware's part aside from the processor (e.g. video card, sound card, chipset, cache latency, byte-sized registers, calling convention use, DDR3 RAM and disk drive, filesystem functioning and so many other things). Am I going about programming wrong? I mean I feel I should know everything that goes on underneath English syntax on a computer program. But the problem is that the more I research every little thing the less I actually accomplish at all. I can never finish anything because of this mentality, yet I feel compelled to know everything... what should I do?

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• Find methods related to testcases in Java

  - by user3623718

  I want to automatically change some methods in the program. These methods contain some compiler error and my program aims to fix these compiler errors. After fixing compiler errors I need to run test cases related to the changed method (or class) to know it is correct and if not which test cases failed. As the programs under investigation are very big, I only need to run test cases related to changes. As an example, if I change one method, then I need to only run test cases related to this method. Therefore, what I need is to programmatically be able to find test cases related to each method, and class. It is also useful if there is a tool that can do that for me. As an example, a tool which creates a matrix shows each test case is related to which method(s) One easy way to do that is to run all test cases and save functions they accessed. However, the problem is at the beginning the input program contains compiler error and it is not possible to run test cases because of these compiler error. Please let me know what is the best way to do that. An API or a tool that I can be used programmatically is the best for me.

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• Where in the registry are application registered hotkeys stored?

  - by Stuart Allen

  I need to find in the registry the key that is holding the hotkey CTRL-ALT-SHIFT-E. This is normally a keyboard shortcut in Photoshop, but I installed some program that did a global override of this sequence. I have uninstalled that program, but it did not clean up after itself. So, where can I find this in the registry, I just want to delete this key so the global override won't affect Photoshop anymore. I've google'd the crap out of this, there are various program that claim to assist, but none of them work.

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• Nullable types and ?? operator C# [en-US]

  - by ruimachado

  Nullable types vs Non-nullable types   While developing our C# projects its frequent the null comparison operation to avoid null exceptions. This simple operation is mainly coded using the "var x = null" code example inside an if clause. However not all types of variables are nullable, which means that setting a variable to null is not allowed in every cases, it depends on what kind of type are you defining. But what if there was an extension to your non-nullable type that would convert your variable types to nullable? This extension really exists. As I said before in C# you have nullable types which represent all the values of an underlying type, and an additional null value and can be declared easily using "T?", where T is the type of the variable and for example the normal int type cannot be null, so its a non-nullable type, however if you define a "int?" your variable can be null, what you do is convert a non-nullable type to a nullable type. Example: int x=null;     Not allowed     int? x=null;   Allowed     While using nullable types you can check if a variable is null the same way you do it with nullable types:     But what about setting a default value when a certain variable is null?   In this cases the c# .net framework let you set a default value when you try to assign a nullable type to a non-nullable type, using the ?? operator. If you don't use this operator you can still catch the InvalidOperationException which is throw in this cases. For example  without the ?? operator :     Using the ?? operator your code becomes cleaner and more easy to read and you get a bonus, you can set a default value for multiple variables using the ?? in a chain set.     That’s it,   Thanks, Rui Machado rpmachado.wordpress.com

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• Do we ethically have the right to use the MAC Address for verification purposes?

  - by Matt Ridge

  I am writing a program, or starting at the very beginning of it, and I am thinking of purchase verification systems as a final step. I will be catering to Macs, PCs, and possibly Linux if all is said and done. I will also be programming this for smartphones as well using C++ and Objective-C. (I am writing a blueprint before going head first into it) That being said, I am not asking for help on doing it yet, but what I’m looking for is a realistic measurement for what could be expected as a viable and ethical option for purchase verification systems. Apple through the Apple Store, and some other stores out there have their own "You bought it" check. I am looking to use a three prong verification system. Email/password 16 to 32 character serial number using alpha/numeric and symbols with Upper and lowercase variants. MAC Address. The first two are in my mind ok, but I have to ask on an ethical standpoint, is a MAC Address to lock the software to said hardware unethical, or is it smart? I understand if an Ethernet card changes if not part of the logic board, or if the logic board changes so does the MAC address, so if that changes it will have to be re-verified, but I have to ask with how everything is today... Is it ethical to actually use the MAC address as a validation key or no? Should I be forward with this kind of verification system or should I keep it hidden as a secret? Yes I know hackers and others will find ways of knowing what I am doing, but in reality this is why I am asking. I know no verification is foolproof, but making it so that its harder to break is something I've always been interested in, and learning how to program is bringing up these questions, because I don't want to assume one thing and find out it's not really accepted in the programming world as a "you shouldn't do that" maneuver... Thanks in advance... I know this is my first programming question, but I am just learning how to program, and I am just making sure I'm not breaking some ethical programmer credo I shouldn't...

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• Shader compile log depending on hardware

  - by dreta

  I'm done with the core of my graphics engine and I'm testing it on every platform I can get my hands on. Now, what I noticed is that different drivers return different shader and program compile log content. For example, on my friend's laptop if you successfuly compile a shader then the log is simply empty. However on my PC I get some useful information along with it. So if I compile a vertex shader, I'll get: Vertex shader was successfully compiled to run on hardware. Which isn't that impressive, but is what happens when I compile a program. On my friend's computer the log is empty, since the program compiles. However on my own computer I get: Vertex shader(s) linked, fragment shader(s) linked. Which is awesome, because I'm attaching a geometry shader with 0 (I have a geometry shader file with trash, so it doesn't compile and the pointer is set to 0), and the compiler just tells me which shaders linked. Now it got me thinking, if I was going to buy a graphics card, is there a way for me to get the information about whether or not I'll get this "extended" compile information? Maybe it's vendor specific? Now I don't expect an answer TBH, this seems a bit obscure, but maybe somebody has any experience with this and could post it.

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• Windows 7 PATH not expanding

  - by trinithis

  I am using the following to create and edit environment variables for Windows 7. Control Panel\All Control Panel Items\System -> Advanced system settings -> Environment Variables Under System variables I have the following pertinant variables: PROG32=C:\Program Files (x86) REALDWG_SDK_DIR=%PROG32%\Autodesk\RealDWG 2011 Path=%REALDWG_SDK_DIR%;%PROG32%\Haskell\bin However, the following happens: C:\>echo %PROG32% C:\Program Files (x86) C:\>echo %Path% %REALDWG_SDK_DIR%;C:\Program Files (x86)\Haskell\bin Is it possible to have a chain of variables expand? If I rename Path to something else, I sometimes get the problem, and sometimes I don't.

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• How does Amazon ec2-user get its sudo rights

  - by Johan

  I am looking for where the default Amazon AMI linux image sets up the privileges for the default ec2-user account. After logging in with this account I can use sudo successfully. Checking via the sudoers file, which I open by running visudo (with no other options) I see a few default settings and permissions for root ALL ALL So ... Where is the permissions for ec2-user assigned? I have not yet tried to add a new permission but ultimately I want to resign ec2-user for systems management tasks and use a non-full root user for administering the applications (stop and start mysql, httpd, edit apache's vhost files, and upload / edit web content under the web root)

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• Apply email retention policy to Inbox but not subfolders?

  - by NaOH

  Our official email policy states that email older than 90 days in the Inbox is moved to Deleted Items, not including subfolders of the Inbox. This wasn't a problem to implement in Exchange 2003. In 2010, however, it appears that Policy Tags applied to the Inbox also apply to its subfolders. How can I prevent this from occuring? EDIT: Here is the output of Get-RetentionPolicy: RunspaceId : b6a05d43-3e56-4348-9d0e-2d2bf7e6c283 RetentionId : 56417b54-af3b-4c14-bd3c-9dcf9bdd133e RetentionPolicyTagLinks : {Junk E-mail - 7 Days, Deleted Items - 7 Days, Sent Items - 90 Days, Inbox - 90 Days} AdminDisplayName : ExchangeVersion : 1.0 (0.0.0.0) Name : Default Company Policy DistinguishedName : CN=Default Company Policy,CN=Retention Policies Container,CN=Company,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=domain,DC=com Identity : Default Company Policy Guid : 56417b54-af3b-4c14-bd3c-9dcf9bdd133e ObjectCategory : domain.com/Configuration/Schema/ms-Exch-Mailbox-Recipient-Template ObjectClass : {top, msExchRecipientTemplate, msExchMailboxRecipientTemplate} WhenChanged : 2/8/2013 2:18:11 PM WhenCreated : 2/8/2013 2:11:18 PM WhenChangedUTC : 2/8/2013 10:18:11 PM WhenCreatedUTC : 2/8/2013 10:11:18 PM OrganizationId : OriginatingServer : server.domain.com IsValid : True

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• Simple C: atof giving wrong value [migrated]

  - by Doc

  I have a program that reads input from a singe line(string obviously) and organizes it into arrays. The problem I have is that at one point the program reads two different values and returns the first one twice. Initially I thought the program was reading the same value twice but when I tested it turned out that it got the correct one but is inputting the wrong one. for example Input: 2 0.90 0.75 0.7 0.65 sorry to snip it (while(fgets (string[test], sizeof(string[test]),ifp)) pch = strtok_r(NULL, " ", &prog); tem3 = atoi(pch); while (loop<tem3) { pch=strtok_r(NULL," ",&prog); venseatfloat[test][loop][DISCOUNT][OCCUPIED]=(float)atof(pch); printf("%f is discount\t",venseatfloat[test][loop][DISCOUNT][OCCUPIED]); pch=strtok_r(NULL, " ", &prog); strcpy(temp, pch); venseatfloat[test][loop][REGULAR][OCCUPIED]=(float)atof(pch); printf("%s is the string but %.3f is regular\n", temp ,venseatfloat[test][loop][DISCOUNT][OCCUPIED]); loop++; } output: >0.900000 is discount 0.75 is the string but 0.900 is regular >0.700000 is discount 0.65 is the string but 0.700 is regular What is going on?

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• Why is the "file" command get confused on .py files?

  - by pythonic metaphor

  I have several python modules that I've written. Randomly, I used file on this directory, and I was really surprised by what I saw. Here's the resulting count of what it thought the files were: 1 ASCII Java program text, with very long lines 1 a /bin/env python script text executable 1 a python script text executable 2 ASCII C++ program text 4 ASCII English text 18 ASCII Java program text That's strange! Any idea what's going on or why it seems to think python modules are very often java files? I'm using CentOS 5.2.

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• How to failover to local account on a cisco switch/router if radius server fails?

  - by 3d1l

  I have the following configuration on a switch that I testing for RADIUS authentication: aaa new-model aaa authenticaton login default group radius local aaa authentication enable default group radius enable aaa authorization exec default group radius local enable secret 5 XXXXXXXXX ! username admin secret 5 XXXXXXXXX ! ip radius source-interface FastEthernet0/1 radius-server host XXX.XXX.XXX.XXX auth-port 1812 acct-port 1813 key XXXXXXXXX radius-server retransmit 3 ! line con 0 line vty 5 15 Radius authentication is working just fine but if the server is not available I can not log into the router with the ADMIN account. What's wrong there? Thanks!

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• Changed folder icon in WinXP and now clicking a folder opens in a new window.

  - by widgisoft

  I got bored and decided to change my folder icon from the boring yellow default. Somewhere in my experiments, I discovered that anytime I open a folder it opens in a "search" window. This happened because when I go to the "(file folder)" type, the only option in there is "find" that is not supposed to be the default; upon saving this form XP tries to do me a favour and sets this as the new default. Now whenever I try to click a folder it opens the search window. How do I fix this?

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• Linux router with diffent gateways for incomming and outgoing connections

  - by nkout

  I have the following topology: LAN Users:192.168.1.2 - 254 (192.168.1.0/24) gateway1: 192.168.2.2/24 used for all outgoing connections of LAN users (default gateway) gateway2: 192.168.3.2/24 used for incoming services (destination NAT, ports 80,443 are forwarded to 192.168.2.1) linux router-server R eth0 192.168.1.1/24: LAN eth1 192.168.2.1/24: WWAN1 eth2 192.168.3.1/24: WWAN2 I want to: route all outgoing traffic coming from LAN and R via 192.168.2.2 route the responses to incoming connections via 192.168.3.2 My config: ifconfig eth0 up 192.168.1.1 netmask 255.255.255.0 ifconfig eth1 up 192.168.2.1 netmask 255.255.255.0 ifconfig eth2 up 192.168.3.1 netmask 255.255.255.0 echo 0 >/proc/sys/net/ipv4/ip_forward route add default gw 192.168.2.2 iptables -t nat -A POSTROUTING -d !192.168.0.0/16 -j MASQUERADE I want to add iptables rule to mark incoming traffic from WWAN2 and send back the responses to WWAN2, while keeping default gateway on WWAN1

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• SharePoint Session Management - which SQL Server option?

  - by frumious

  We're developing some custom web parts for our WSS 3 intranet, and have just run into something we'd like to use ASP.NET sessions for. This isn't currently enabled on the development server. We'd like to use SQL Server as the storage mechanism, because the production environment is a web farm with very simple load-balancing. There are 3 options you can choose from to set up the SQL Server session storage, tempdb, default separate DB, named DB. Both tempdb and default separate DB create a new DB to store certain information in; tempdb stores the actual session info in tempdb, which doesn't survive a reboot, and default separate DB stores everything in the new DB. Since you've got to create the new DB either way, my question is this: why would you ever choose to store the session info in tempdb? The only thing I can think of is if you'd like to have the ability to wipe the session by rebooting the server, but that seems quite apocalyptic!

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• maxItemsInObjectGraph limit required to be changed for server and client

  - by Michael Freidgeim

  We have a wcf service, that expects to return a huge XML data. It worked ok in testing, but in production it failed with error  "Maximum number of items that can be serialized or deserialized in an object graph is '65536'. Change the object graph or increase the MaxItemsInObjectGraph quota."The MSDN article about   dataContractSerializer xml configuration  element  correctly  describes maxItemsInObjectGraph attribute default as 65536, but documentation for of the DataContractSerializer.MaxItemsInObjectGraph property and DataContractJsonSerializer.MaxItemsInObjectGraph Property are talking about Int32.MaxValue, which causes confusion, in particular because Google shows properties articles before configuration articles.When we changed the value in WCF service configuration, it didn't help, because the similar change must be ALSO done on client.There are similar posts:http://stackoverflow.com/questions/6298209/how-to-fix-maxitemsinobjectgraph-error/6298356#6298356You need to set the MaxItemsInObjectGraph on the dataContractSerializer using a behavior on both the client and service. See  for an example.http://devlicio.us/blogs/derik_whittaker/archive/2010/05/04/setting-maxitemsinobjectgraph-for-wcf-there-has-to-be-a-better-way.aspxhttp://stackoverflow.com/questions/2325321/maxitemsinobjectgraph-ignored/4455209#4455209 I had forgot to place this setting in my client app.config file.http://stackoverflow.com/questions/9191167/maximum-number-of-items-that-can-be-serialized-or-deserialized-in-an-object-graphttp://stackoverflow.com/questions/5867304/datacontractjsonserializer-and-maxitemsinobjectgraph?rq=1 -It seems that DataContractJsonSerializer.MaxItemsInObjectGraph has actual default 65536, because there is no configuration for JSON serializer, but  it complains about the limit.I believe that MS should clarify the properties documentation re default limit and make more specific error messages to distinguish server side and client side errors.Note, that as a workaround it's possible to use commonBehaviors section which can be defined only in machine.config:<commonBehaviors> <behaviors> <endpointBehaviors> <dataContractSerializer maxItemsInObjectGraph="..." /> </endpointBehaviors> </behaviors></commonBehaviors>v

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• pc dont work at full speed

  - by kubilas

  motherboard gigabyte GA-8I915PL-G, pentium 4 630 3,0 ghz dont run at default speed ; fsb 800, cpu host 200, cpu 3000 mhz but run some time at fsb 533 cpu host 133 cpu 2025 mhz some time at fsb 75 and cpu 1128 mhz only. when i set in easy tune default parametrs pc dont work. some time i clear cmos and i can set in bios default parametrs, some time clearing cmos dont help, bios i update. how i can fix this problem? sorry about my bad english.

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• Windows 7 Boot Loader - Remove 30 second waiting time

  - by derekhh

  I've installed Fedora 17 and Windows 7 on two different hard disks as a dual-boot system. The default boot loader is GRUB 2 maintained and configured in Fedora 17. When I startup and choose "Windows 7 bootloader (on /dev/sda1)" in GRUB 2, Windows 7 boot loader will appear, with only Windows 7 as the only choice and also the default operating system, with a 30 second waiting time if no input is detected. I'm trying to see if it is possible to remove this 30-second waiting time. I've tried to follow the instructions on the Web by configuring default operating system in the control panel but seems there is something wrong with it. I've also tried to use "bcdedit enum /all" but still receives error prompts. Update: Added my boot tab screen in msconfig.

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• Password protected traffic meter

  - by UncleBob

  Hi first, I have a small problem for which I haven't found a solution yet. I live in Bosnia and share the Internet connection with the landlady, and as is usual in Bosnia, we do not have a flat rate, but a 15 Giga traffic limite. That would actually be more than enough, if the son of the landlady wouldn't be watching videos all the time, so the bills are truning out rather expensive. I have already installed a traffic monitoring program, but he apparently turns it off as soon as he comes close to his limit and then denies that he consumed any more. I therefore need at least a measurement program that is password protected and / or notes in the log when it's been turned off. Even better would be a program that just cuts his access when he exceeds his share, ie a mixture of Traffic meter and Parental Guard. Can someone help me out here?

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• Is there a way to adjust colors of a specific window?

  - by Synetech

  Is there a (Windows) program or something that will allow the user to adjust the brightness/contrast/gamma of a specific window rather than the whole screen? As a use-case scenario, imagine having a web-page showing on one half of the screen, and another program taking up the rest of the screen. This other program uses the default Windows colors (e.g., white background), so it may be glaringly bright. Alternately, the web-page may be too dark to see. Adjusting the monitor or video-card settings would affect everything which will be no good. Adjusting the default Windows colors is, at best, inconvenient. Instead, there needs to be a way to set the colors of one of the windows to equalize the whole screen.

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• Batch file to open multiple cmd prompts

  - by JHarris

  I am trying to write a batch file that will automate the following manual process: Open a new cmd prompt (prompt1) Run a bat file (b1) Run a program (that will continue to run) Minimize prompt1 Open a new cmd prompt (prompt2) Run a bat file (b1) Run a different program (that will continue to run) Minimize prompt2 I've found ways to open multiple instances of cmd to run different things, but after I've run the first thing (b1), I then need to run a program in that same cmd window. I currently have start /min cmd /k C:\Users\db2admin\python_environment\Scripts\activate.bat start /min cmd /k C:\Users\db2admin\python_environment\Scripts\activate.bat This opens the two windows and runs the bat, great, but now I need to execute another command (running a python file) in each of the cmd windows. How do I send commands to each prompt?

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• Distribution upgrade freezes

  - by lugte098

  When upgrading from Ubuntu 10.04 to 10.10 the distribution upgrade program freezes after it notifies me of a change in /etc/apparmor.d/usr.bin.mysqld and asks me to keep the old file or accept the new changes (I accepted them). The terminal says: Configuration file `/etc/apparmor.d/usr.sbin.mysqld' ==> Modified (by you or by a script) since installation. ==> Package distributor has shipped an updated version. What would you like to do about it ? Your options are: Y or I : install the package maintainer's version N or O : keep your currently-installed version D : show the differences between the versions Z : start a shell to examine the situation The default action is to keep your current version. *** usr.sbin.mysqld (Y/I/N/O/D/Z) [default=N] ? y Installing new version of config file /etc/apparmor.d/usr.sbin.mysqld ... The program hasn't done anything after this for about 2 hours now and I have no idea what I should do at this point. Can I quit the program and restart it? Or is there another action I should take? It did however change the '/etc/apparmor.d/usr.sbin.mysqld' to the new version, but is still frozen...

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• Other computer can't connect to MySQL Database

  - by user23950

  I have a VB .NET program the uses a MySQL database. It works when the computer that has WAMP installed is the one running the program. The same program now displays an Unhandled Exception error when the computer it's running on does not have WAMP installed (and running). The only thing that is installed is the MySQL connecter net. How can I make this work? I have already tried opening port 20 by configuring the firewall. I did this for both TCP and UDP.

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• Installing software from source

  - by Learning

  I'm trying to understand the rational behind installing from software from source in Ubuntu 12.04. Obviously, I know I can download what I need from repos, but I want to develop a deeper understanding of Linux. As a Windows users, when I download a program I double click it, and it installs into the program files directory unless I specify otherwise. When I want to uninstall it, Windows has a tools that does that for me. When I install a program in Linux, where does it install to? How do I uninstall it afterwards? Are there residual files left over? How would I tell if it's been fully removed? For instance, I'm going to install LMMS (Linux Multimedia Studio) from source. I download and decompress the tar ball, and have a folder name lmms_XXX.tar (whatever). The folder is now on my desktop with an install file. If I run the install file from that location, does it install into that folder? If so, can I move that folder to where ever I want? I want thinking about putting it in /opt/lmms

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